Contents
How do I sort a varchar column in mysql?
There are a few ways to do this:
- Store them as numeric values rather than strings. You’ve already discounted that as you want to keep strings like 00100 intact with the leading zeros.
- Order by the strings cast as numeric.
- Add a third column which is the numeric equivalent of the string and index on that.
What is order by 3 in SQL?
Order by 3 DESC. In this query, column birthdate is at the 3rd position; therefore, we can use three in the Order by clause to sort results on this column data. Note: I would not recommend using column position in Order By clause. You should always use a column name in Order by clause.
What is numeric sort?
Numeric sort (‘ sort -n ‘) treats the entire string as a single numeric value, and compares it to other values. For example, 8.1 , 8.10 and 8.100 are numerically equivalent, and are ordered together. Similarly, 8.49 is numerically smaller than 8.5 , and appears before first.
How is varchar field sorted numerically in MySQL?
Even though it is of type varchar, it stores integer values with optional leading zeros. A sort orders them lexicographically ( “42” comes before “9” ). How can I order by numeric values ( “9” to come before “42” )?
How to sort A varchar column that contains..?
When it does contain numbers, I want it to be sorted numerically, e.g. as “1”, “2”, “10” instead of “1”, “10”, “2”. Fields containing just letters, or letters and numbers (such as ‘A1’) can be sorted alphabetically as normal. For example, this would be an acceptable sort order. 1 2 10 A B B1 What is the best way to achieve this? sqltsql Share
How are alpha characters sorted in A varchar field?
If it’s not numeric we simply take the ASCII value of the leading character and sort by that. This allows us to also sort the alpha characters within the field. Here is the new result:
Can a field be sorted alphabetically in SQL?
Fields containing just letters, or letters and numbers (such as ‘A1’) can be sorted alphabetically as normal. For example, this would be an acceptable sort order. What is the best way to achieve this? One possible solution is to pad the numeric values with a character in front so that all are of the same string length.